Terribly pleased to obtain a new walkway by the sea? (9)
I believe the answer is:
esplanade
'walkway by the sea?' is the definition.
(I've seen this before)
'terribly pleased to obtain a new' is the wordplay.
'terribly' is an anagram indicator.
'to obtain' indicates putting letters inside.
'a new' becomes 'an' (I've seen this in other clues).
'pleased' anagrammed gives 'esplade'.
'esplade' placed around 'an' is 'ESPLANADE'.
(Other definitions for esplanade that I've seen before include "Sea-front drive" , "Seaside road" , "Long level area for walking beside the sea" , "place for a stroll" , "Seafront walkway" .)